Version 1.3.5 released

Broker

Fix possible memory leak when using a topic that has a leading slash. Fixes
bug #1360985.

Fix saving persistent database on Windows.

Temporarily disable ACL checks on subscriptions when using MQTT v3.1.1. This
is due to the complexity of checking wildcard ACLs against wildcard
subscriptions. This does not have a negative impact on security because
checks are still made before a message is sent to a client. Fixes bug
#1374291.

When using -v and the broker receives a SIGHUP, verbose logging was being
disabled. This has been fixed.